JPS5571908A - Digital level display device - Google Patents

Digital level display device

Info

Publication number
JPS5571908A
JPS5571908A JP14530278A JP14530278A JPS5571908A JP S5571908 A JPS5571908 A JP S5571908A JP 14530278 A JP14530278 A JP 14530278A JP 14530278 A JP14530278 A JP 14530278A JP S5571908 A JPS5571908 A JP S5571908A
Authority
JP
Japan
Prior art keywords
level
segments
display
comparators
level display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14530278A
Other languages
Japanese (ja)
Inventor
Takamitsu Sunaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP14530278A priority Critical patent/JPS5571908A/en
Publication of JPS5571908A publication Critical patent/JPS5571908A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To display the level of broad range with a small number of segments by changing the brightness of the lowest level display segment according to the input signal level less than a fixed level.
CONSTITUTION: The LED display segments which consist of elements S2WS25 of 1dB step and the lowest level display element S1 are arranged in the form of a bar graph. An output of the signal source 2 is detected and fed to the segments S2WS25 through the comparators C1WC24 and to the segment S1 through the negative feedback type linear amplifier A, the reference inputs of comparators C1WC24 are connected to the power supply E. The amplifier A operates in the range from a level slightly higher than the noise level to the lowest level of -20dB to drive the element S1. Thus, the presence of input signal not more than -20dB can be displayed by the element S1.
COPYRIGHT: (C)1980,JPO&Japio
JP14530278A 1978-11-27 1978-11-27 Digital level display device Pending JPS5571908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14530278A JPS5571908A (en) 1978-11-27 1978-11-27 Digital level display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14530278A JPS5571908A (en) 1978-11-27 1978-11-27 Digital level display device

Publications (1)

Publication Number Publication Date
JPS5571908A true JPS5571908A (en) 1980-05-30

Family

ID=15381998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14530278A Pending JPS5571908A (en) 1978-11-27 1978-11-27 Digital level display device

Country Status (1)

Country Link
JP (1) JPS5571908A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575598A4 (en) * 1992-01-09 1995-03-22 Square D Co Multi-zone audio distribution amplifier.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575598A4 (en) * 1992-01-09 1995-03-22 Square D Co Multi-zone audio distribution amplifier.

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